Abstract: A porous body, for a solid electrolytic capacitor, is made from a combination of titanium and aluminum in order to reduce dependence upon tatalum, a material which is now in extremely short supply. First, the titanium hydride and aluminum are milled into an extremely fine micro-powder. Then, the powders are mixed with the aluminum content in the range of 45%-65%, compressed into the desired body shape, and given a three-step heat treatment. In the first step, the body is heated at a temperature of 400.degree. to 500.degree. C. for a dehydrogenation. In the second step, the dehydrogenated body is heated to an alloying temperature which is higher than 500.degree. C., but lower than the melting point of aluminum. In the third step, the alloyed body is heated to a temperature which is higher than the melting point of aluminum (about 1000.degree. C.).

Abstract: A high polymer composition consisting essentially of a nitrogen-containing organic high polymer, such as polyvinylpyridine, polyvinylquinoline, polyacrylonitrile, or polyvinylcarbazole, and 20-90% by weight of a 7,7,8,8-tetracyanoquinodimethane complex salt of N-methylacridinium. The composition has an electric conductivity of 10.sup..sup.-2 mho/cm or more and is useful, among others, as a semiconductor layer of a solid electrolytic capacitor.